This report introduces a visco-elasto-plastic constitutive model for the characterisation of stress-strain behaviour in bituminous mixtures. With the introduction of the Helmholtz free energy and using the concept of internal variables, it has been possible to express a plastic flow law, characterised by isotropic hardening. The formulation of the constitutive relationship has been developed in such a way as to verify a priori the universal dissipation principle, expressed by the Clausius-Duhem dissipative inequality. The model has been calibrated and validated on the basis of the creep recovery response of two different bituminous mixtures under various stress levels and loading time. © 2015 Elsevier Ltd.

Computational analysis of the creep behaviour of bituminous mixtures

BALDO, Nicola
2015

Abstract

This report introduces a visco-elasto-plastic constitutive model for the characterisation of stress-strain behaviour in bituminous mixtures. With the introduction of the Helmholtz free energy and using the concept of internal variables, it has been possible to express a plastic flow law, characterised by isotropic hardening. The formulation of the constitutive relationship has been developed in such a way as to verify a priori the universal dissipation principle, expressed by the Clausius-Duhem dissipative inequality. The model has been calibrated and validated on the basis of the creep recovery response of two different bituminous mixtures under various stress levels and loading time. © 2015 Elsevier Ltd.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11390/1070027
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